Effects of Testosterone The effects of testosterone are a massive muscle gain and mass gain. The muscles are, like mentioned before, of the best quality which can be achieved by a steroid cycle. Since testosterone aromatizes very well to estrogen, the use of zinc about 100mg a day is a must. In testosterone cycles of more than 750mg per week anti estrogens like Nolvadex (Tamoxifen) or Arimidex should be taken, to avoid binding the estrogen to the estrogen receptors. If not blocking the estrogen receptors some of the side effects like the following are possible.

Side effects of testosterone water retantion acne gyno sexual stimulation agression decreased spermatogenesis hair loss and alle side effects like any other steroid could bring with its use.